Results 141 to 150 of about 531 (180)
Some of the next articles are maybe not open access.
Electronic speckle pattern interferometry for modal analysis
The Journal of the Acoustical Society of America, 2005Electronic speckle pattern interferometry is a common method for determining resonant frequencies and visualizing mode shapes of relatively small objects; however, the apparatus required for this type of interferometry is typically expensive and extremely sensitive to ambient vibrations.
openaire +1 more source
Multiwavelength electronic speckle pattern interferometry for surface shape measurement
Applied Optics, 2007Profilometry by electronic speckle pattern interferometry with multimode diode lasers is both theoretically and experimentally studied. The multiwavelength character of the laser emission provides speckled images covered with interference fringes corresponding to the surface relief in single-exposure processes. For fringe pattern evaluation, variations
Barbosa, Eduardo A., Lino, Antonio C. L.
openaire +3 more sources
Phase extraction from electronic speckle pattern interferometry addition fringes
Applied Optics, 1994Addition fringes are obtained in real time from electronic speckle pattern interferometry (ESPI) by use of a twin-pulsed laser when two pulses are fired during a single field of a CCD camera. This enables object deformations to be studied in harsh environmental conditions.
A J, Moore, J R, Tyrer, F M, Santoyo
openaire +2 more sources
Electronic Speckle‐Pattern Interferometry Measurements of Structural Ratcheting Strain
Strain, 2010Abstract: Several tensile specimens with a central hole were subjected to a cyclic loading for which the Von Mises stress was beyond the initial yield stress in the vicinity of the hole. The tensile machine was fixed together with a phase‐shifting electronic speckle‐pattern interferometry measurement bench that makes it possible to perform strain ...
Farge, L., Nazarov, R., Ayadi, Z.
openaire +1 more source
Electronic Speckle Pattern Interferometry for Micromechanical Measurements
Advanced Engineering Materials, 2002A new optical setup that could be used for the analysis of displacement (or strain) of objects with diffuse as well as mirror-like reflecting (specular) surfaces is presented here together with the algorithm of data analysis. Combination of these two new approaches allows to minimize the area of analysis and to extend the class of materials to which ...
S. Tamulevičius +3 more
openaire +1 more source
Electronic speckle pattern interferometry using digital image processing techniques
Applied Optics, 1980The use of digital image processing techniques for electronic speckle pattern interferometry is discussed. A digital TV-image processing system with a large frame memory allows us to perform precise and flexible operations such as subtraction, summation, and level slicing. Digital image processing techniques make it easy compared with analog techniques
S, Nakadate, T, Yatagai, H, Saito
openaire +2 more sources
Additive/subtractive decorrelated electronic speckle pattern interferometry
Optical Engineering, 1993A hybrid additive-subtractive decorrelated electronic speckle pattern interferometry (ESPI) scheme using a continuous reference updating technique is presented. Unlike conventional ESPI techniques, this method uses speckle phase decorrelation between successively subtracted additive correlated speckle images, each of which contains information about ...
openaire +1 more source
Electronic Speckle Pattern Interferometry (ESPI)
2021Lianxiang Yang, Xinya Gao
openaire +1 more source
An overview of real‐world data sources for oncology and considerations for research
Ca-A Cancer Journal for Clinicians, 2022Lynne Penberthy +2 more
exaly
Electronic speckle pattern interferometry with a microcomputer
Applied Optics, 1984B F, Oreb, B, Sharon, P, Hariharan
openaire +2 more sources